American Film Institute's top 10 sci-fi movies,Hollywood

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1. "2001: A Space Odyssey" (1968)

2. "Star Wars: Episode IV -- A New Hope" (1977)

3. "E.T. the Extra-Terrestrial" (1982)

4. "A Clockwork Orange" (1971)

5. "The Day the Earth Stood Still" (1951)

6. "Blade Runner" (1982)

7. "Alien" (1979)

8. "Terminator 2: Judgment Day" (1991)

9. "Invasion of the Body Snatchers" (1956)

10. "Back to the Future" (1985)